CVE-2024-20353
Cisco ASA and FTD Denial of Service Vulnerability
Cisco · Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
Vulnerability details
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an infinite loop vulnerability that can lead to remote denial of service condition.
Added to CISA KEV: 2024-04-24
Ransomware campaign use: Unknown
CISA due date: 2024-05-01
Defensive guidance from CISA
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.
Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC